 /* 导航栏 */
 .nav {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 80px;
     background-color: rgba(0, 0, 0, .8);
     z-index: 5;
 }

 .nav .head {
     text-align: center;
     line-height: 80px;
 }

 .nav .head ul li {

     float: left;
 }

 .nav .head ul li a {
     display: block;
     padding: 0 15px;
     font-size: 14px;
     color: #fff;
 }

 .nav .head ul li a:hover {
     color: #31c27c;
 }

 .nav .head .right {
     float: right;
 }

 .nav .head .right li {
     float: left;
     font-size: 12px;
     color: #9e9e9e;
 }

 .nav .head .right li a {
     font-size: 12px;
     color: #9e9e9e;
     color: #31c27c;
     padding: 0;
 }